security-review-owasp-deserialization

To find unsafe deserialization vulnerabilities, review native object streams, pickle, or unserialize handlers that accept untrusted data in APIs, queues, and caches. This analysis flags polymorphic type control issues and gadget-chain abuse paths to prevent remote code execution.

A deserialization gadget chain is a sequence of methods triggered when untrusted serialized data is materialized into objects. Unsafe object instantiation allows attackers to chain methods, leading to arbitrary type materialization and remote code execution during native deserialization.

To secure polymorphic typing, implement class allowlists and validate library configuration to prevent arbitrary object materialization. Review custom deserializers and migrate to safer data-only alternatives instead of using native binary serializers for untrusted serialized data.

Yes, this deserialization security review checks file loaders, database reads, request handlers, and queues that process untrusted serialized data. It evaluates signed payload handling and library hardening gaps across Java, Python, PHP, and .NET serialization flows.

You should migrate away from native object serialization when request handlers or file loaders accept untrusted serialized data. Replacing native deserializers with safer data-only alternatives eliminates gadget-chain risks and prevents arbitrary type materialization vulnerabilities.